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net/mlx5: Implement sriov_get_vf_total_msix/count() callbacks

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The mlx5 implementation executes a firmware command on the PF to change
the configuration of the selected VF.

Link: https://lore.kernel.org/linux-pci/20210314124256.70253-5-leon@kernel.org
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
This commit is contained in:
Leon Romanovsky 2021-03-14 14:42:56 +02:00
parent 604774add5
commit e71b75f737
3 changed files with 44 additions and 0 deletions
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2
drivers/net/ethernet/mellanox/mlx5/core/main.c
View File

@ -1700,6 +1700,8 @@ static struct pci_driver mlx5_core_driver = {
.shutdown = shutdown,
.err_handler = &mlx5_err_handler,
.sriov_configure = mlx5_core_sriov_configure,
.sriov_get_vf_total_msix = mlx5_sriov_get_vf_total_msix,
.sriov_set_msix_vec_count = mlx5_core_sriov_set_msix_vec_count,
};
static void mlx5_core_verify_params(void)

7
drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
View File

@ -140,6 +140,7 @@ void mlx5_sriov_cleanup(struct mlx5_core_dev *dev);
int mlx5_sriov_attach(struct mlx5_core_dev *dev);
void mlx5_sriov_detach(struct mlx5_core_dev *dev);
int mlx5_core_sriov_configure(struct pci_dev *dev, int num_vfs);
int mlx5_core_sriov_set_msix_vec_count(struct pci_dev *vf, int msix_vec_count);
int mlx5_core_enable_hca(struct mlx5_core_dev *dev, u16 func_id);
int mlx5_core_disable_hca(struct mlx5_core_dev *dev, u16 func_id);
int mlx5_create_scheduling_element_cmd(struct mlx5_core_dev *dev, u8 hierarchy,
@ -278,4 +279,10 @@ int mlx5_load_one(struct mlx5_core_dev *dev, bool boot);
int mlx5_vport_get_other_func_cap(struct mlx5_core_dev *dev, u16 function_id, void *out);
void mlx5_events_work_enqueue(struct mlx5_core_dev *dev, struct work_struct *work);
static inline u32 mlx5_sriov_get_vf_total_msix(struct pci_dev *pdev)
{
struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
return MLX5_CAP_GEN_MAX(dev, num_total_dynamic_vf_msix);
}
#endif /* __MLX5_CORE_H__ */

35
drivers/net/ethernet/mellanox/mlx5/core/sriov.c
View File

@ -187,6 +187,41 @@ int mlx5_core_sriov_configure(struct pci_dev *pdev, int num_vfs)
return err ? err : num_vfs;
}
int mlx5_core_sriov_set_msix_vec_count(struct pci_dev *vf, int msix_vec_count)
{
struct pci_dev *pf = pci_physfn(vf);
struct mlx5_core_sriov *sriov;
struct mlx5_core_dev *dev;
int num_vf_msix, id;
dev = pci_get_drvdata(pf);
num_vf_msix = MLX5_CAP_GEN_MAX(dev, num_total_dynamic_vf_msix);
if (!num_vf_msix)
return -EOPNOTSUPP;
if (!msix_vec_count)
msix_vec_count =
mlx5_get_default_msix_vec_count(dev, pci_num_vf(pf));
sriov = &dev->priv.sriov;
/* Reversed translation of PCI VF function number to the internal
* function_id, which exists in the name of virtfn symlink.
*/
for (id = 0; id < pci_num_vf(pf); id++) {
if (!sriov->vfs_ctx[id].enabled)
continue;
if (vf->devfn == pci_iov_virtfn_devfn(pf, id))
break;
}
if (id == pci_num_vf(pf) || !sriov->vfs_ctx[id].enabled)
return -EINVAL;
return mlx5_set_msix_vec_count(dev, id + 1, msix_vec_count);
}
int mlx5_sriov_attach(struct mlx5_core_dev *dev)
{
if (!mlx5_core_is_pf(dev) || !pci_num_vf(dev->pdev))